- A progression ring for interfaces of instruction sequences, threads, and services
- Number of pages
- Document type
- Faculty of Science (FNWI)
- Informatics Institute (IVI)
We define focus-method interfaces and some connections between such interfaces and instruction sequences, giving rise to instruction sequence components. We provide a flexible and practical notation for interfaces using an abstract datatype specification comparable to that of basic process algebra with deadlock. The structures thus defined are called progression rings. We also define thread and service components. Two types of composition of instruction sequences or threads and services (called `use' and `apply') are lifted to the level of components.
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